Connecting-rod.



PATENTBD DEG. 15, 1903'. o. W. HART, y .CONNEUTING Ron.

AVPPLIOATIGN FILED MAY 15, 1903.

HO MODEL.k

' N @yf/f v TTORNEY UNITED STATEQS Patented ecember 15, 1903.

CHARLES w. HART," on lCHARLES crrY, IowA.

CONNECTlNGfROD.

SPECIFICATION forming part of Letters Patent No. 746,699, dated December 15, 1903.

Application Bled May 15,1903. .Serial Noi 157,221. (No models To @ZZ whom it may concern:

Beit known that LCHARLES W.HART,a citizen of the United States, residing at Charles City, county of Floyd, and State of Iowa, have invented new and useful Improvements in Connecting-Rods, of which the following is a specification. Y

My invention relates to improvements in connecting-rods for internal-combustion eugines. In such engines the piston usually has Iche general form of an open-ended cylinder into which the connecting-rod extends and is secured by a cross-pin .ittin g suitable sockets or apertures in the wall of the piston or in projections therefrom. The connecting-rods heretofore in general use have been similar in construction to those used in steam-engines, no account being taken of the dierences of strain or pressure between the ont and in strokes of internal-combustion engines and consequent excess of Wear on the outer half of the coupling-bearings and no regard being had for the'dilcnlty of securing an accurate adjustment of the piston-pin bearings'at the inner end of the connecting-rod, which rod extends for some distance into the piston-cavity. In some instances constructions have been devised with a View to overcoming the objections incident to the use of said ordinary form of connecting-rod; but such constructions have for various reasons been found impractical, and the same have been generally discarded.

The object of this invention is to provide practical and efficient means for securing an equal and delicate adjustment of the connecting-rod coupling-bearings at both ends and from a point exterior to the piston; also, to provide adequate means for locking the parts in any desired position of adj nstment.

In the following description reference is had to the accompanying drawings, in which- Figure lis a side View of the invention. Fig. 2 is a view drawn at right angles to that of Fig. l and showing the link connections between the movable coupling members.

Like parts are identiiied by the saine reference characters in both views.

l is the main bar of the connecting-rod.

2 and 3 are the xed members of the crank and piston-pin couplings, respectively.

4 isa portion of the crank-pin, and 5 a portion of the piston-pin. These parts. may be of any ordinary construction.

The adjustable coupling members or caps 6 and 7 are hinged at one side to the corresponding fixed members, as indicated at 8 in Fig. 1, and at the other side they are connected to each other by an adjustable linkrod formed in sections 9 and 10 and attached to the members 6 and 7, respectively, by pivotpins l1, located at right angles to the line of strain and parallelwith the piston and crankpins. The sections of the link are connected by a right and left threadedlink-nut l2 with two lock-nuts I3 on the screw-threaded ends ofthe respective link-sections 9 and l0, whereby no change of adjustment can take place without sim nltaneousretraction of both lock-v nuts.

The section 9 of the link which is connected with the cap 6 at the crank-pin end is shorter than the section 10, thus locating the link-nut l2 outside of the piston, w-here it can be easily reached for readjustment at any time. With the described construction it will be observed that an adjustment of the single link-nut will be effective to tighten the hearings of both couplings with equal tension. Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is

' l. A connecting-rod, having end bearing members, and hinged caps, cooperative with said bearing members tol form couplings; and an adjustable link connection extending along one side of the rod and pivotally secured to the caps on the side opposite the` alink connection between said caps, comprising sections .pivoted to the caps and connected with each other by a link-nut, operative upon right and left screw-threaded sec- 'tion ends to connect the sections and adj ust rod, and connected with one coupling member at each end; and intermediate means for adjusting the link.

6. The combination with a connecting-rod, having sectional coupling-bearings at each end; of anadjusting-link parallel with the rod and pivotally connected with one coupling member at each end; and intermediate means for adjusting the link.

In testimony whereof I affix my signature in the presence of two Witnesses.

CHARLES W. HART.

Witnesses:

ETHEL HIoKooX, M. E. ARKILLS. 

